Cardiovascular Health Indicator
Measure: Stroke Hospitalization Rate
|Indicator||Date of Most Recent Measure||Current Measure||Trend|
|Age-Adjusted Hospitalization Rate due to Cerebrovascular Disease (Stroke)||2017||192.2
- In 2017, there were almost 13,000 hospitalizations of Minnesotans for stroke, or a rate of 192 hospitalizations per 100,000 people.
- The total number of stroke hospitalizations has stayed relatively steady from 2005 through 2017, but the hospitalization rate has declined.
- The declines in stroke hospitalization rates are limited to adults ages 65 and older. Adults younger than 65 have experienced no change in hospitalization rates between 2005 and 2017.
As shown in Table 1, the total number of hospitalizations of Minnesotans due to stroke and transient ischemic attacks (TIA) has remained fairly stable from 2005 through 2015, with an uptick the last couple of years. TIAs are temporary blockages in the blood supply to the brain. Sometimes these are called “mini-strokes.” The rate of hospitalization for all stroke and TIA has declined in a steady fashion, as shown in Chart 1. This decline can largely be explained by our aging population, with more people at risk of hospitalization for stroke and TIA, even though approximately the same number of events are occurring.
Table 1: Total Hospitalizations and Hospitalization Rate due to Stroke and TIA for all Minnesotans, 2005-2017
|Year||Number of Hospitalizations||Age-Adjusted Hospitalization Rate (per 100,000)|
Chart 1: Age-adjusted Hospitalization Rate due to Stroke and TIA for all Minnesotans, 2005-2017
Table 2 shows the number of hospitalizations and hospitalization rate by year for younger (ages 18-44), middle-aged (ages 45-64), and older (ages 65+) adults. In each year, the vast majority of hospitalizations is occurring in older adults 65 years and older. The overall decline in the rate of stroke and TIA hospitalization rates appears to be driven exclusively by declines in the rate of stroke among older adults aged 65 or older. Rates of stroke and TIA hospitalization have remained stable in the 18-44 and 45-64 year old age groups. The number of hospitalizations in middle-aged adults has increased steadily since 2005.
Table 2: Total Hospitalizations and Hospitalization Rate due to Stroke and TIA for adult Minnesotans by age group, 2005-2017
|Year||Number of Hospitalizations, ages 18-44 years||Hospitalization Rate, ages 18-44 years (per 100,000)||Number of Hospitalizations, ages 45-64 years||Hospitalization Rate, ages 45-64 years (per 100,000)||Number of Hospitalizations, ages 65+||Hospitalization Rate, ages 65+ years (per 100,000)|
Chart 2A shows the rate of hospitalizations for stroke for 18-44 year olds. Between 2005 and 2017, the overall rate has remained essentially unchanged, hovering between 26 and 30 hospitalizations per 100,000 per year.
Chart 2A: Hospitalization Rate due to Stroke and TIA for Minnesotans ages 18-44, 2005-2017
Chart 2B shows the hospitalization rate for stroke for 45-64 year olds. Like for younger adults, the overall hospitalization rate has remained essentially unchanged over the 2005 to 2017 time period, hovering between 201 and 226 hospitalizations per 100,000 per year.
Chart 2B: Hospitalization Rate due to Stroke and TIA for Minnesotans ages 45-64, 2005-2017
Chart 2C shows the rate of hospitalizations for stroke for individuals 65 years and older. Between 2005 and 2017, the overall rate dropped by 470 hospitalizations per 100,000 per year, or about 33%. Unlike in the younger and middle-aged adults, this long-term decline has been consistent, and appears to have accelerated since 2011.
Chart 2C: Hospitalization Rate due to Stroke and TIA for Minnesotans ages 65+, 2005-2017
- Interactive Atlas of Heart Disease & Stroke
Online mapping tool from CDC with health indicators (including mortality and hospitalizations), risk factors, social and economic data, health care delivery, insurance, and health care costs data for states and counties. Some census tract data is also available.
- AHRQ HCUPNet
Online data tool from the Agency for Healthcare Research and Quality (AHRQ) for the Healthcare Cost and Utilization Project (HCUP). Users can download quick tables or create custom queries of national and state-level data on inpatient hospitalization, emergency department, and ambulatory surgery care.
The data were obtained through the Minnesota Hospital Discharge Dataset, also known as the Minnesota Hospital Uniform Billing (UB) Claims Data, provided to the Health Economics Program at the Minnesota Department of Health by the Minnesota Hospital Association. The dataset captures hospitalizations for Minnesota residents and comes from Minnesota hospitals (except for Federal Hospitals owned by the Veterans Administration or the Indian Health Service) or other states that share data with the state of Minnesota (including the bordering states of Iowa, North Dakota, and South Dakota; hospitalizations that occur in Wisconsin for Minnesota residents are not included/shared). Annual population estimates were obtained through the U.S. Census Bureau in collaboration with the National Center for Health Statistics.
Cerebrovascular Disease (Stroke) hospitalizations through September 30, 2015 are identified as the primary discharge diagnosis of ICD-9: 430-438, including Hemorrhagic Stoke as ICD-9: 430-431, Ischemic Stroke as ICD-9: 434 and 436, and Transient Ischemic Attack (TIA) as ICD-9: 435. Starting on October 1, 2015, hospitalizations for cerebrovascular disease (stroke) were identified as the primary discharge diagnosis as ICD-10: I60-I69, including Hemorrhagic Stroke as ICD-10: I60-I62, Ischemic Stroke as ICD-10: I63, and Transient Ischemic Attack (TIA) as ICD-10: G45.9. Patients who are discharged to another hospital are excluded so as to prevent double-counting single events resulting in hospitalizations at multiple facilities.
The change from ICD-9 to ICD-10 introduces some uncertainty in the trend from 2014 through 2016, , because changes in coding may lead to differences in classification of conditions before and after the transition.